Muffler



May 5, 1931. A. w. w. VAN HOORN MUFFLER Filed Nov.

/YTTORNEY Patented May 5, 1931 UNITED STATES PATENT ori-'ICE ALBERT W. W. VAN HOORN, OF WILMINGTON, DELA/ARR ASSIGNOR TO AMERICAN CAB AND FOUNDRY COMPANY, OF NEW YORK, N. Y., .A CORPORATON OF NEW JERSEY MUFFLER Application filed November 22, 1829.

This invention relates to eXhaust muiilers for use with hydrocarbon engines and has for one object the provision of a simple, cheap and effective device that can be readily con- '5 structed of cast metal to provide a device which may be easily assembled and disassembled.

Another object of the invention is the provision of a mufller for internal combustion engines, which is formed of a number of identical or similar castings detachably connected together.

Still another object of this invention is the provision of a mufHer which is so constructed as to reduce back pressure on the engine to a minimum.

A further object of the invention is the provision ofna muffler particularly adapted for use with marine engines in which backflow of water is prevented.

A still further object of this invention is the provision of a muffler for marine engines which is so formed as to retain therein a quantity of water suiiicient to insure proper cooling and muiiling or sound reduction of the eX- haust gases.

Other objects and advantages of this invention will be apparent from the following description taken in conjunction with the acoompanying drawings, in which:

Figure 1 is a sectional view of the muffler; the view being taken on the line 1--1 Figure 2' Fig. 2 is a sectional view of the muffler taken on the line 242 Figure 1;

Fig. Sis an end view of the muffler shown inthe preceeding figures, the view being that of the left-hand end of Figure 2; and

Fig. 4 is an end view taken at the right of Figure2, certain parts being broken away to show the interior of the muiiier.

Referring now more particularly to the drawings, the muffler of the present invention is in general, a substantially hollow casing (rectangular in the instance shown) composed of two identical castings A and B which for convenience are termed upper and lower mufller sections respectively.

Each muifler section comprises a shell or body having a top 2, side walls 4, ends 6 and Serial No. 409,034.

8 respectively and a marginal flange 10 eX- tending from the sides and ends. As clearly shown in Fig. 1 the sections taper gradually in depth from the end 6 toward the end 8.

Formed in the interior of each section are horizontal and vertical partitions 14 and 16 respectively, partition 14 extending completely across the section from side wall to side wall and being arranged within the latter, that is, away from the marginal attachings flanges as clearly shown in Fig. 1. The horizontal partition entends from end to end of the section at an incline with respect thereto, which incline is in accordance with the taper of the section. The partition 14 forms a baffle and is provided with a plurality of transversely arranged openings 17, elongated in the instance shown, which are arranged along one side edge of the baffle or, to be more eXact, to one side of the vertical partition 16 (see Fig. 2). The vertical partition extends only partly the length of the muffler section as shown in Figs. 1 and 2 and it defines two horizontally arranged chambers 18 and 20 respectively; chamber 2,0 being of greater area than chamber 18 to permit expansion of the gases received therein as more clearly pointed out hereinafter. rIlhe end 6 of each muffler section is provided with a nipple 22 to which an exhaust pipe is secured.

In assembling the muffler of the present invention, the upper and lower sections A and B are connected together at the attaching flanges thereof by means of suitable fasteners such as bolts 24; the smaller end of the one section being arranged adjacent the larger end of the other section whereby to define a substantially rectangular structure. From an inspection of Fig. 1 it will be apparent that due to the specific construction of the muffler sections, there are provided within the hollow casing spaced parallel baffles which are formed of the two partitions'14. Preferably each partition 14 is provided with an uneven number of openings 17 (5 in the instance shown) whereby when the two muffier sections are assembled the respective openings in the partitions 14 will not be in alinement with each other but will be staggered with respect to each other.

With the muffler sections assembled as shown in Fig. 1, the two nipples i12 are arranged in different elevations; the nipple of the lower section being arrangedat a lower elevation than the nipple of the upper section. 'This provid-es a construction in which7 when the muffler is used with a marine engine, water will be maintained or received in the lower muffler section to provide for the cooling of the gases passing through the muflier and also for aiding in thereduction of sound. Due to this stepped arrangement of the ipples of each section7 the tendency of bachfiow of' the water from the lower section to the upper section and then into the exhaust pipe connected to the latter is reduced to a mini-l mum.

In use exhaust gases are passed from the exhaust pipe connected to the nipple of the muffler section into the chamber 2O where they are initially expander ane. passed into the chamber 18 of the mufller section A and through the openings in the baffle 14C. rEhe gases which have been expanded in the chamber 20 are broken up thebaille 1li of muffler section A and still further broken up by the baffle 14 in the muler section B and they pass through the openings in the baffle 111 of section B into the chamber of mufller section B and then around the vertical partition 16 of mufller section B into the chamber 2O of said muffler section B where they mingle with the water therein and are still further expanded and reduced in temperature and are exhausted through the nipple 22 connected to the end 6 of muffler section B. inasmuch as the mufflerA of the present invention is designed for use with internal combustion engines, including marine engines, the partitions 14 are provided with drain openings 211. to permit draining of any water from the interior of the upper section A into the lower section B. v

From the above description it is believed that the construction and operation of the muffler of the present invention will be fully apparent to those skilled in the art to which it appertains. It will be apparent that the muffler shown herein is extremely simple, easy to manufacture and assemble and is formed of two identical parts which are, in effect, complemental whereby a mere bolting together of the two muffler sections will result in the completed structure.

rlhe drawings show one embodiment of the invention but it is to be understood that they are for illustrative purposes only and that various changes in the form and proportions of the device may be made within the scope of the ap oended claims without departing from the spirit of the invention.

What is claimed is:

1. In a muffler, a pair of similar members adapted to be connected to form a hollow casing7 said members each having an inclined baille therein extending from end to end of said members.

2. An exhaust muffler comprising tivo hollow sections connected together to provide a closed chamber, each of said sections having an inclined baffle therein provided with perforations, the inclined bafi'les being so positioned in each of said sections as to be parallel with each other in the chamber.

3. An exhaust muffler comprising two connected .similar hollow sections each provided with a horizontal partition and an imperforate verticalpartition, the horizontal partitions having a plurality of perforations therein arranged at one side of the vertical partitions.

4. An exhaust mufller formed of two similar sections7 each tapering in depth from end to end and providedv with a perforated horizontal partition inclined in accordance with the taper of the sect-ions whereby when said sections are i assembled position a hollow casing having parallel inclined partitions is provided.

5. An exhaust muffler unit comprising a hollow member tapering in depth from end to end and having a continuous inclined perforated baille therein extending from end to end, and al longitudinally extending partition at right angles to said baffle and defining two passages.

6. An exnaust muffler unit comprising a hollow member tapering in depth from end to end and having a perforated baille therein extending from end to end and inclined in accordance with the tapering of said member7 said member also having a partition at right angles to said bale and extending only partly the length of said hollow member.

'7. in exhaust muffler unit comprising a hollow member tapering in depth from end to end and having a perforated baffle therein extending from end to end and inclined in accordance with the tapering of said member, said member also having a partition at riOht angles to said baffle and extending yonly partly the length ofy said hollow member, said perforations in the baille being arranged on one side of said partition.

8. An exhaust muffler con'iprising'a hollow casing having spaced parallel baffle plates therein inclined from end to end of said casing, and partitions arranged in said casing at opposite ends thereof and at substantially right angles with respect to said baffles and each extending only partly the length of said casing, said baflles each having a plurality of perforations.

9. An exhaust muffler comprising a hollow casing having spaced parallel baffle plates therein inclined from end to end of said casing7 and partitions arranged in said casing at opposite ends thereof and at substantially right angles with respect to said baffles and each extending only partly the length of v passages, one horizontal partition being VGO said casing, said baiiies each having a plurali ity of pertorations arranged on one side oi the partitions.

10. An exhaust muiiier comprising a pair of similar sections tapered from end to end and connected to form a hollow casing, each ot said sections having an inclined horizontal baiiie therein and a vertical partition deiining two passages, said par itions extending'only partly the length of said sections whereby to provide a communicating between the two passages, and said baiiies having pertorations arranged on one side of the vertical partitions.

11. An exhaust muiiier comprising a hollow casing having spaced inclined horizontal partitions extending from end to end thereof, a vertical partition in the upper portion of the casing extending from one end partly the length of said casing and defining two base thereof and the portion ot the partition forming the base of one passage being provided with pertorations, a. vertical partition in the lower portion of the casing and extending from the opposite end ot the casing partly the length thereof to define spacer passages in the lower portion of said casing, the base ot which passages is the other horizontal partition and the portion ot the partition forming the base of one ot said passages being perforated.

12. An exhaust mutfler comprising a hoilow casing formed of a pair of similar sections each comprising a hollow member tapering from end to end and provided with a horizontal inclined bae and a vertical partition, the latter defining two passages and extending only partly the length of the member, and said battle being perforated on one Vside of the partition.

13. An exhaust muiiler comprising a hollow casing formed ot a pair of similar sections each comprising a hollow member tapering from end to end and provided with a horizontal inclined battle and a vertical partition, the latter defining two passages and extending only partly the length of the member, and said battle being perforated on one side of the partition, said members being connected togetherwith the deeper end of one member gdj acent the smaller end ot the opposite mem- 14. An exhaust muiiier comprising a hollow casing formed of a pair of similar sections each comprising a hollow member tapering from end to end and provided with a horizontal inclined baiiie and a. vertical partition, the latter defining two passages and extending only partly the length of the member, and said baiiie being perforated on one side of the partition, said members being connected together with the deeper end ot one member acent the smaller end of the opposite member and a nipple at the deeper end of each member in communication with one of said passages.

15. An exhaust muiiler comprising two hollow members tapering in depth from end to end and having the deeper end of one thereof arranged adjacent to and connected with the smaller end ot the other, each of said members being identical in form and having a battle in the interior thereof which is inclined in accordance with the taper ot the member, a partition at snastantially right angles to the baffle and forming two passages in each member, one of which passages has pertorations formed in the battle, said partitions extending only partly the len'th of said member, and a nipple at the deeper end ot' each member whereby when said members are assembled thc nipples will be in different horizontal planes.

16. In an exhaust muiiler, a casing divided horizontally at an incline into upper and lower sections connected together, spaced parallel baiiies in the casing, one arranged in each of said sections and provided with perforations, a vertical partition in the upper section oined with the batt e therein, and a vertical partition in the lower section joined with the baflie therein, said perforations being arranged at one side of said vertical partitions.

17. .in an exhaust muitier, a casing divided horizontally at an incline into upper and lower sections connected together, spaced parallel inciined battles in the casing, one arranged in each ot said sections and provided with perforations, a vertical partition in the upper section joined with the baiiie therein, and a vertical partition in the lower section joined with the bai'iie therein, said perforations being arranged at one side of said vertical partitions.

In witness whereof I have hereunto set my hand.

ALBERT W. W. VAN HOORN. 

